1954
Energy
United States
Silicon solar cell
Bell Labs demonstrates a photovoltaic cell of practical efficiency.
Why it mattered
Electricity directly from sunlight, now the cheapest power on Earth.
Information Age
1954
2 recorded milestones at this point in the record.
1954
Medicine
United States
Kidney transplant between twins
Joseph Murray's team performed the first lasting organ transplant.
Why it mattered
Proved transplantation could work, launching immunology of rejection.
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